t1: id: 1 node_id: 3 sequence_id: 1 t2: id: 2 node_id: 3 sequence_id: 1 t3: id: 3 node_id: 3 sequence_id: 1 t4: id: 4 node_id: 15 sequence_id: 1 w5_n1: id: 5 node_id: 4 sequence_id: 1 w5_n2: id: 5 node_id: 4 sequence_id: 2